Thousands of spectators and supporters are expected to line the streets of the borough to cheer on runners during the annual Ealing Half Marathon on Sunday September 25 from 9am.
And whether you're training to run the race, or wanting to go along and cheer friends or family taking part, you'll need to know the route well.
Below is a map of the course, which starts and finishes in Lammas Park... Take a long look if you're taking part, you'll be running this in a few short weeks!
The race is one of only three fully road closed half marathons in London, and in 2014, 2015 AND 2016 was voted best Half Marathon in the UK.
If you'd like to sign up to run the race, there's still time. Spaces are very close to selling out, so make sure you book yours as soon as possible.
Entry costs £36 for affiliated runners and £38 for unaffiliated runners. Enter here to take part.
Take a look back at 2015's Ealing Half Marathon in our photo gallery.